Hypothetical question. What would happen if the 9v power plug was plugged into the ear or mic socket accidentally on the ZX81?
Surprised Sinclair never went for a barrel jack socket for the power like the spectrum.
3.5mm jack sockets
Re: 3.5mm jack sockets
Page seven of the manual..
"If by accident you plug it into the wrong socket in the computer you will do no damage..."
Is the simple answer, the bods who know more than me will no doubt elucidate further.
"If by accident you plug it into the wrong socket in the computer you will do no damage..."
Is the simple answer, the bods who know more than me will no doubt elucidate further.

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Re: 3.5mm jack sockets
It is what it is, and it is as per the manual.
Well, as long as you don't leave it plugged in incorrectly for any length of time.
Mark
Well, as long as you don't leave it plugged in incorrectly for any length of time.
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert 
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
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ZX81 Chip Pin-outs
ZX81 Video Transistor Amp


There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb

Spring approaching...
Re: 3.5mm jack sockets
I was just thinking about changing the power 3.5mm socket with barrel jack socket.
If I find a suitable part I'll post back here
If I find a suitable part I'll post back here

Re: 3.5mm jack sockets
A zeddy with a barrel jack is an alien 

In theory, there is no difference between theory and practice. But, in practice, there is.
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Re: 3.5mm jack sockets
It’s rather unlikely that you will find a suitable barrel jack socket that will fit directly on the PCB.
Mark
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert 
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Spring approaching...
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp


There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb

Spring approaching...